The stratum corneum is the outermost layer of cells in our epidermis, serving to protect the skin. When the stratum corneum is too thin, the skin tends to become red and sensitive. On the other hand, when it's too thick, the skin may appear yellowish and dull. Moreover, excessively thickened stratum corneum can also affect the skin's absorption of nutrients. So, how do we remove the old, dead skin and restore the fineness of our skin? Let's take a look at some practical methods for exfoliation below.